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Is EFFICACIOUS a valid Scrabble word?

Yes, EFFICACIOUS is a valid word in US Scrabble and UK Scrabble, worth 21 points.

Base score before bonus squares; blank tiles score zero.

What does EFFICACIOUS mean?

  1. adjective

    marked by qualities giving the power to produce an intended effect

    “written propaganda is less efficacious than the habits and prejudices...of the readers”

  2. adjective

    producing or capable of producing an intended result or having a striking effect

    “an air-cooled motor was more effective than a witch's broomstick for rapid long-distance transportation”

Definitions from WordNet 3.1, Princeton University.

Points

21

Scrabble

24

Words With Friends

11

Letters

E (1) + F (4) + F (4) + I (1) + C (3) + A (1) + C (3) + I (1) + O (1) + U (1) + S (1) = 21 points in Scrabble.

Dictionary status

  • Scrabble (US & Canada)Valid
  • Scrabble (UK & worldwide)Valid
  • Words With FriendsListed

Scrabble lists: NWL2023 (US & Canada) and CSW24 (UK & worldwide). WWF uses our ENABLE reference plus verified additions. “Listed” and “Not listed” describe that reference; check acceptance in the game. Sources reviewed 2026-10-03.

Hooks for EFFICACIOUS

EFFICACIOUS has no one-letter front or back hooks in US Scrabble. Adding a single letter to either end does not make another word in that list.

Front hooks0

None — nothing can be added to the front.

Back hooks0

None — nothing can be added to the end.

Words you can make from EFFICACIOUS

The 60 highest-scoring words using these letters.

Study EFFICACIOUS and related words

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